(a)
On the basis of investigation and valuation, the board shall adopt the mortality, service, and other tables as it deems necessary, and shall make changes in the contributions required from contracting departments as the board considers appropriate in order to assure the actuarial soundness of this award system.
(b)
The board shall credit all contributions of departments in the fund with interest at the annual interest rate compounded at each June 30.
(c)
Data filed by a member or department with the board is confidential, and no individual record shall be divulged by an official or employee having access to that data to a person other than the member to whom the information relates or his or her authorized representative, or the department that employs the member. That information shall be used by the board for the sole purpose of carrying into effect the provisions of this chapter.
(d)
Each volunteer member and department shall file with the board the information and evidence as may be required by the board in administration of this award system.